Cooling device for a turbine of a turbomachine

Abstract

Cooling device ( 21 ) extending circumferentially around a turbomachine casing, such as a turbine casing, comprising a support ( 24 ) extending axially and designed to be secured to the casing, at least one cooling tube extending circumferentially, at least one securing member ( 25 ), comprising a radially inner portion ( 36 ) at least partially surrounding the tube, and a radially outer portion ( 37 ) secured to the support ( 24 ), the radially outer portion ( 37 ) of the securing member ( 25 ) being secured to the support ( 24 ) via the intermediary of a connection member ( 30 ) comprising a central portion ( 31 ) having a circumferential end portion ( 32 ) and a second circumferential end portion ( 32 ) which are circumferentially opposite, the first end portion ( 32 ) and the second end portion ( 32 ) each extending in an opposite axial direction, the first and second end portions ( 32, 32 ) each being secured to the support ( 24 ), the radially outer portion ( 37 ) of the securing member ( 25 ) being secured to the central portion ( 31 ) of the connection member ( 30 ).

The invention claimed is: 
     
       1. A cooling device configured to extend circumferentially around a casing of a turbomachine, comprising:
 an axially extending support for attachment to the casing, 
 at least one circumferentially extending cooling tube, 
 at least one fixing device, comprising a radially inner part at least partly surrounding the tube, and a radially outer part fixed to the support, characterised in that the radially outer portion of each fixing device is fixed to the support via a connecting member, each connecting member comprising a central portion having a first circumferential end portion and a second circumferential end portion which are circumferentially opposite, the first end portion and the second end portion each extending in an opposite axial direction, the first and second end portions each being fixed to the support, the radially outer part of each fixing device being fixed to the central portion of a respective one of the at least one connecting member. 
 
     
     
       2. The cooling device according to  claim 1 , characterised in that each connecting member is formed by a folded sheet metal. 
     
     
       3. The cooling device according to  claim 2 , characterised in that the end portions of the at least one connecting member are fastened to the support by means of rivets. 
     
     
       4. The cooling device according to  claim 2 , characterised in that the radially outer part of each fixing device is fastened to the respective connecting member by means of at least one axially extending screw or rivet. 
     
     
       5. The cooling device according to  claim 2 , comprising at least two of the tubes extending circumferentially and axially spaced apart, each tube being attached to at least one of said at least one fixing device, the radially outer part of each fixing device being attached to the central part portion of a respective one of the at least one connecting member. 
     
     
       6. The cooling device according to  claim 1 , characterised in that the end portions of the at least one connecting member are fastened to the support by means of rivets. 
     
     
       7. The cooling device according to  claim 6 , characterised in that the radially outer part of each fixing device is to the respective connecting member by means of at least one axially extending screw or rivet. 
     
     
       8. The cooling device according to  claim 6 , comprising at least two of the tubes extending circumferentially and axially spaced apart, each tube being attached to at least one of said at least one fixing device, the radially outer part of each fixing device being attached to the central portion of a respective one of the at least one connecting member. 
     
     
       9. The cooling device according to  claim 6 , characterised in that the support has at least one lumen located radially opposite the radially inner part of the fixing device or devices. 
     
     
       10. The cooling device according to  claim 1 , characterised in that the radially outer part of each fixing device is fastened to the respective connecting member by means of at least one axially extending screw or rivet. 
     
     
       11. The cooling device according to  claim 10 , characterised in that the central portion of each connecting member has a radially extending oblong hole, said at least one axially extending screw or rivet being engaged in said oblong hole. 
     
     
       12. The cooling device according to  claim 11 , comprising at least two of the tubes extending circumferentially and axially spaced apart, each tube being attached to at least one of said at least one fixing device, the radially outer part of each fixing device being attached to the central portion of a respective one of the at least one connecting member. 
     
     
       13. The cooling device according to  claim 10 , comprising at least two of the tubes extending circumferentially and axially spaced apart, each tube being attached to at least one of said at least one fixing device, the radially outer part of each fixing device being attached to the central portion of a respective one of the at least one connecting member. 
     
     
       14. The cooling device according to  claim 10 , characterised in that an axially extending spacer is mounted between the radially outer part of at least one of the at least one fixing device and the respective connecting member or members. 
     
     
       15. The cooling device according to  claim 1 , comprising at least two of the tubes extending circumferentially and axially spaced apart, each tube being attached to at least one of said at least one fixing device, the radially outer part of each fixing device being attached to the central portion of a respective one of the at least one connecting member. 
     
     
       16. The cooling device according to  claim 1 , characterised in that the support has at least one lumen located radially opposite the radially inner part of the fixing device or devices. 
     
     
       17. The cooling device according to  claim 16 , characterised in that the support has an axially extending main wall in which the at least one lumen is formed, the support having at least one stop portion extending axially between two portions of said lumens and extending, at least in part, radially outwardly from the main wall. 
     
     
       18. The cooling device according to  claim 1 , characterised in that an axially extending spacer is mounted between the radially outer part of at least one of the at least one fixing device and the respective connecting member or members. 
     
     
       19. An assembly comprising an annular casing of a turbomachine, and the cooling device according to  claim 1 , fixed to said casing and surrounding said casing.